The best and most correct answer among the choices provided by the question is the third choice (3) , conduction occurs when two bodies has connected to transfer heat. Hope my answer would be a great help for you. If you have more questions feel free to ask here at Brainly.
The diagram that best represent heat transfer mainly by the process of conduction is : Option 3 in conduction, heat transfer is caused by collision between neighboring molecules. Another example os heat transfer between stove and oven
